CHM 204 CBT PRACTICE

Ace/Undergragra 1 week ago

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Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace CHM 204 exam

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In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

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Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

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70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

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Created on June 21, 2024 By

Ace/Undergragra

CHM 204

1 / 40

The cannonical forms of benzene were proposed by _____________

A. None of the options

B. Kekule and Dewar

C. Dalton and Dewar

D. Kekule and Dalton

2 / 40

2. The method of reduction of the carbonyl group of ketone produced by Friedel -crafts acylation is ------------ reduction.

A. Alkylation

B. Clemenson

C. Electrophilic

D. Acylation

3 / 40

3. Another name for methyl benzene is __________

A. Xylene

B. Toluene

C. Naphthalene

D. Phenol

4 / 40

4. Which of the following is the formula for Hydroxylamine ?

A. C6.H5.NH-OH

B. H2.N.OH

C. CH3.NH2.OH

D. CH2.OH

5 / 40

The stronger an acid the ___________ is its conjugate base

A. Both have no correlation

B. Weaker

C. Stronger

D. None of the options

6 / 40

6. Polymerization of ethyne produces ?

A. Benzoic acid

B. Benzene

C. none of the above

D. polyethyne

7 / 40

7. The number or π-electrons in benzene is _____________

A. 4

B. 2

C. 8

D. 6

8 / 40

Identify the most acidic compound from the following options

A. Cl2.CH.COOH

B. C2.H5.COOH

C. Cl.CH2.COOH

D. C3.H7.COOH

9 / 40

9. The process by which benzene and its derivatives are extracted from petroleum is called ___________

A. Cracking

B. Aromatization

C. Hydroforming

D. Polymerization

10 / 40

10.

) [CH3Co]20 is ______

A. Dicarboxylic acid

B. An amide

C. An anhydride

D. An ether

11 / 40

11.

CH3COCH3 stands for ------

A. Aldehyde

B. Ester

C. Acid

D. Ketone

12 / 40

12. Ketones are less susceptible to nucleophilic attack than aldehydes because ____?

A. Aldehydes are more stable than ketones

B. Ketones are less stable than aldehydes

C. ketones are more reactive

D. The steric hinderance of the alkyl group of ketones may affect their reactivity

13 / 40

13. Organic chemistry is the study of ?___

A. all carbon compounds

B. some carbon compounds

C. hydro carbon

D. non hydro carbons

14 / 40

14. For halogen derivatives of aromatic compounds, boiling point ---------- with increase in atomic size of the halogen atom.

A. Averages

B. Have no effect

C. Decreases

D. Increases

15 / 40

15. An equilibrium mixture of ethanol and water boils at?

A. 78 and 100) degree C

B. 68 and 98) degree C

C. 68 degree C

D. 90 degree C

16 / 40

16. Denaturation involves the loss of what type of structure?

A. Tertiary

B. Secondary

C. Secondary and Tertiary

D. Primary

17 / 40

17. Which of the following statements is incorrect?

A. Methanol is also called wood alcohol

B. Aliphatic alcohols are less acidic than phenols

C. Alcohol can be prepared from the reduction of esters

D. Alcohol can be prepared by addition of water to double bonds

18 / 40

18. The E2 reactions of alkyl halides are favoured by the use of __________

A. Strong Acid

B. Strong Base

C. Weak Base

D. Weak Acid

19 / 40

19. The gas produced when sodium metal is dropped in ethanol _____

A. O2

B. CO2

C. N2

D. H2

20 / 40

20.

A benzenoid hydrocarbon in which two benzene rings are fused together at the ortho position is called ____________

A. Naphthalene

B. Phenanthrene

C. Biphenyl

D. Anthracene

21 / 40

21. The product of fermentation of cassava is ____

A. Aldehyde

B. carboxylic acid

C. ketone

D. Alcohol

22 / 40

22. In order to produce a primary amide,an acid chloride should be treated with ___

A. Ammonia

B. A secondary amine

C. A primary amine

D. An alcohol

23 / 40

23. A positive test to Benedict’s reagent is indicated by ___

A. Blue to brick-red

B. Brick-red to brown

C. Brown to blue

D. Brick-red to blue

24 / 40

24. The general reaction of the carbonyl groups?

A. nucleophilic addition

B. electrophilic addition

C. nucleophilic substitution

D. electrophilic substitution

25 / 40

25. Reacting acid anhydride with benzene will produce _____

A. aldehyde,ketone and alcohol

B. the reaction would not occur because of steric hinderance

C. esters,alcohol and carboxylic acid

D. ketone and carboxylic acid

26 / 40

26. An example of Isolated Benzenoid Hydrocarbon is __________

A. Biphenyl

B. Anthracene

C. Phenatrene

D. Naphthalene

27 / 40

27. There are ---------- resonance structures of benzene

A. 5

B. 3

C. 4

D. 2

28 / 40

28. phenol is regarded as an acid because _____

A. it easily releases a proton due to resonance

B. it’s volatile

C. it’s corrosive to the skin

D. it’s insoluble in water

29 / 40

29. Beside peptide bond,what other covalent bonds are commonly found in peptides ?

A. disulfide bond

B. hydrogen bond

C. ether bond

D. hndrophobic bond

30 / 40

30. The following terms can be used to describe cellulose except ____

A. Biomass

B. Polysaccharide

C. Bioenzyme

D. Polymer

31 / 40

31. Saponification reaction is best described as _____

A. Soap making reaction

B. Acid promoted hydrolysis reaction

C. Condensation reaction

D. Base promoted hydrolysis reaction

32 / 40

32. Which pair of reactants below will react to produce an acetal ?

A. primary aldehyde + ketone

B. alcohol + aldehydes

C. acid + acetone

D. ketone + alcohol

33 / 40

33. Iodoform is easily recognized by?

A. it’s urine smell

B. It’s ether smell and blue colour

C. it’s medicinal smell and yellow colour

D. it’s ammonia smell and green colour

34 / 40

34.

Ar-OH stands for ------- functional group

A. Phenol

B. Ester

C. Aldehyde

D. Ketone

35 / 40

35.

A functional group in a molecule exhibits characteristic ------

A. Physical properties

B. Chemical properties

C. Odour change

D. Colour change

36 / 40

36. The following will turn blue black with iodine except ____

A. Pupuru

B. Guinea corn

C. Garri

D. Groundnut

37 / 40

37.

The parent compound of polynuclear hydrocarbons is ___________

A. Naphthalene

B. Biphenyl

C. Anthracene

D. Phenatrene

38 / 40

38. Which general class of compounds does amine belong?

A. Nitrile

B. Propanol amine

C. Nitro amine

D. Acetamide

39 / 40

39. which of the following can be used to elongate a sugar ?

A. H.C.N

B. Na.BH4

C. N.H2.OH

D. All

40 / 40

40.

The benzenoid hydrocarbons in which two or more benzene rings are fused together at ortho position in such a way that each pair of rings shares rings shares two carbons are called ---------- benzenoid hydrocarbon.

A. All the options

B. None of the options

C. Isolated

D. Condensed

Your score is

The average score is 23%

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Ace/Undergragra 1 week ago

0 69 1 minute read

CHM 204 CBT PRACTICE

Ace/Undergragra

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